Re: [PATCH 0/2] Support user xattrs in cgroupfs

[Daniel Xu]

On Tue Mar 3, 2020 at 8:50 AM, Shakeel Butt wrote:
> Hi Daniel,
>
> 
> On Mon, Mar 2, 2020 at 5:42 PM Daniel Xu <dxu@xxxxxxxxx> wrote:
> >
> > User extended attributes are useful as metadata storage for kernfs
> > consumers like cgroups. Especially in the case of cgroups, it is useful
> > to have a central metadata store that multiple processes/services can
> > use to coordinate actions.
> >
> > A concrete example is for userspace out of memory killers. We want to
> > let delegated cgroup subtree owners (running as non-root) to be able to
> > say "please avoid killing this cgroup". In server environments this is
> > less important as everyone is running as root.
>
> 
> I would recommend removing the "everyone is running as root" statement
> as it is not generally true.
>
> 
> Shakeel

Good point, thanks.